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EP0156316A2 - Dispositif de mémoire avec commande d'accès de données - Google Patents

Dispositif de mémoire avec commande d'accès de données Download PDF

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Publication number
EP0156316A2
EP0156316A2 EP85103360A EP85103360A EP0156316A2 EP 0156316 A2 EP0156316 A2 EP 0156316A2 EP 85103360 A EP85103360 A EP 85103360A EP 85103360 A EP85103360 A EP 85103360A EP 0156316 A2 EP0156316 A2 EP 0156316A2
Authority
EP
European Patent Office
Prior art keywords
bits
memory
bit number
bit
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85103360A
Other languages
German (de)
English (en)
Other versions
EP0156316A3 (en
EP0156316B1 (fr
Inventor
Mitsuo Saito
Takeshi Aikawa
Akio Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP0156316A2 publication Critical patent/EP0156316A2/fr
Publication of EP0156316A3 publication Critical patent/EP0156316A3/en
Application granted granted Critical
Publication of EP0156316B1 publication Critical patent/EP0156316B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C8/00—Arrangements for selecting an address in a digital store
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/04—Addressing variable-length words or parts of words
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
    • G11C7/1006—Data managing, e.g. manipulating data before writing or reading out, data bus switches or control circuits therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C8/00—Arrangements for selecting an address in a digital store
    • G11C8/12—Group selection circuits, e.g. for memory block selection, chip selection, array selection

Definitions

  • the present invention relates to a memory device for use with a picture or image display device or the like.
  • the number of the dots that are accessed at one time varies depending upon the kind of figure. For example, in displaying a letter, a picture image, or the like, it will be desired to be able to access to all the dots that make up the letter or the picture image at one time. On the other hand, in displaying a geometrical figure such -as straight line, a circle, or the like, it will be easier for human observer to view it as being described gradually one dot at a time.
  • the N bits in the word with address i are divided into groups of n bits which are memorized at the l addresses at i + 0, i + 1, ., i + (l-1)
  • the internal address generating circuit outputs saiuentially l kinds of internal addresses and I kinds of data selection signals to the memory circuit and the data selection circuit based on the control signal at the input terminal respectively, and outputs the write indication signal to the memory circuit for t times as well, which accomplishes the rewriting of all of the N bits with address i in the memory circuit.
  • the internal address generating circuit outputs, based on the control signal at the input terminal,lkinds of data selection signals and the specified internal addresses in address i that are generated sequentially foretimes to the data selection circuit and the memory circuit, respectively, and outputs as well the write indication signal to the memory circuit for l. times. In this case, it is very inefficient since the data for the n bits outputed from the data selection circuit are written for!
  • Another object of the present invention is to provide a memory device which is adapted for shortening the time for processing an access.
  • Another object of the present invention is to provide a memory device which is adapted for giving access to the desired bits in a word simultaneously.
  • the internal address generating circuit 20 outputs, based on the control signal at the input terminal 16. l kinds of data selection signals and the specific internal addresses in address i that are generated sequentially for A times to the data selection circuit 14 and the memory circuit 10, respectively, and outputs as well the write indication signal to the memory circuit for l times.
  • the memory 32 is constructed by 4k words X 16 bits.
  • the memory device 30 includes further a multiplexer 36 which selectively switched and outputs the 16-bit addresses (A O - A 15 ) that are sent from the CPU 34 in accordance with the bit number (bit width) to be accessed.
  • the multiplexer 36 outputs to the memory 32, A 0 to All when the bit width to be accessed is bits (a word unit), and A4 to A 15 when the width is one bit. That is, word addresses are sent from the CPU 34 using A 0 to All in the case of an access with 16-bit width, and using A4 to A 15 in the case of an access with 1-bit width.
  • the lower addresses A 0 to A3 are utilized for selecting the bit positions to be accessed in the word addresses designated by A4 to A 15 .
  • a decoder 38 receives, in the case of an access with 1-bit width, address A 0 to A3 from the multiplexer 36, and outputs a write control signal for designating one bit to be accessed in the 16 bits (one word) designated by A4 to A 15 .
  • a register 40 is used for obtaining a write control signal which is required in the case of access with 16-bits width.
  • An input and output circuit 42 is adapted for sending to the memory 32 the data sent through the data bus or for reading the data in the memory 32, according to the indication from an R/W signal line 56.
  • addresses A 0 to A 15 are sent from the CPU 34.
  • a signal which indicates 16-bit width (call this signal "1" ) is inputted to the multiplexer 36 from the IO register 46 in accordance with the indication from the CPU 34, the multiplexer 36 outputs only addresses A 0 to A 11 to the memory 32.
  • the addresses A 12 to A 15 are not utilized.
  • the words in the memory 32 that corresponds to the addresses A 0 to A 11 are chosen.
  • the signal "1" that is inputted to the bit width indication signal line 50 is sent also to the register 40.
  • Figure 4a is a construction diagram for the address data used for the case of an access with 1-bit width.
  • the content of the upper portion A 4 to A 15 represents the word address of the memory 32, and in this example the word at address 13 is the one to be accessed.
  • the content of the lower portion A O to A3 indicates the one bit in the word to be accessed. In concrete terms, it is for indicating which one of the small memories (that is, it indicates which one of the write enable signals WE 0 to WE 15 is to be turned on), and in the case of the figure, WE which is connected to the small memory #4 will be turned on. When this is translated into the positions for the word and bit, the data will be written into the fourth bit.
  • the bit for address 13 in the small memories is shown, and the content of A 0 to A 2 shows that the write enable signal lines WE 7 and WE 8 are to be turned on.
  • this shows that it corresponds to the fourth 2-bit from the left end of ; address 13 (precisely the seventh and eighth bits).
  • the data for the 2-bit groups are sent to the data bus (in this case, they may be sent as identical eight sets of 2-bit data or as a single set), and the input and output circuit 42 shown in Fig. 2 inputs the 2-bit data to each of (D 0 D 1 ), (D 2 D 3 ), ..., and (D 14 D 15 ) of the memory 32.
  • Fig. 2 inputs the 2-bit data to each of (D 0 D 1 ), (D 2 D 3 ), ..., and (D 14 D 15 ) of the memory 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Dram (AREA)
  • Digital Computer Display Output (AREA)
  • Controls And Circuits For Display Device (AREA)
EP85103360A 1984-03-24 1985-03-22 Dispositif de mémoire avec commande d'accès de données Expired - Lifetime EP0156316B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP55273/84 1984-03-24
JP59055273A JPS60200287A (ja) 1984-03-24 1984-03-24 記憶装置

Publications (3)

Publication Number Publication Date
EP0156316A2 true EP0156316A2 (fr) 1985-10-02
EP0156316A3 EP0156316A3 (en) 1989-06-28
EP0156316B1 EP0156316B1 (fr) 1993-05-12

Family

ID=12993988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85103360A Expired - Lifetime EP0156316B1 (fr) 1984-03-24 1985-03-22 Dispositif de mémoire avec commande d'accès de données

Country Status (4)

Country Link
US (1) US4660181A (fr)
EP (1) EP0156316B1 (fr)
JP (1) JPS60200287A (fr)
DE (1) DE3587329D1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3618136A1 (de) * 1985-06-21 1987-01-02 Mitsubishi Electric Corp Abwechselnd adressierte halbleiterspeichergruppe
EP0230316A2 (fr) * 1986-01-22 1987-07-29 Hitachi, Ltd. Commande séquentielle
EP0262413A1 (fr) * 1986-09-04 1988-04-06 Fujitsu Limited Dispositif de mémoire à multiplexage d'adresses
WO1988005244A1 (fr) * 1986-12-30 1988-07-14 Questech Limited Ameliorations apportees a l'enregistrement et a la production d'images de television mobiles
EP0509811A2 (fr) * 1991-04-18 1992-10-21 Mitsubishi Denki Kabushiki Kaisha Dispositif de mémoire à semi-conducteurs
GB2271449A (en) * 1992-09-29 1994-04-13 Ricoh Kk Dram and controller
GB2300952A (en) * 1995-05-17 1996-11-20 Altera Corp Variable depth and width memory device
GB2306238A (en) * 1995-10-10 1997-04-30 Holtek Microelectronics Inc Interface circuit and method for memory access
US5717901A (en) * 1995-05-17 1998-02-10 Altera Corporation Variable depth and width memory device
US6052327A (en) * 1997-10-14 2000-04-18 Altera Corporation Dual-port programmable logic device variable depth and width memory array
US6191998B1 (en) 1997-10-16 2001-02-20 Altera Corporation Programmable logic device memory array circuit having combinable single-port memory arrays
US6288970B1 (en) 1997-10-16 2001-09-11 Altera Corporation Programmable logic device memory array circuit having combinable single-port memory arrays
USRE38651E1 (en) * 1994-05-18 2004-11-09 Altera Corporation Variable depth and width memory device
US7111110B1 (en) 2002-12-10 2006-09-19 Altera Corporation Versatile RAM for programmable logic device

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6028795A (en) 1985-09-24 2000-02-22 Hitachi, Ltd. One chip semiconductor integrated circuit device having two modes of data write operation and bits setting operation
US5923591A (en) * 1985-09-24 1999-07-13 Hitachi, Ltd. Memory circuit
KR910000365B1 (ko) * 1984-10-05 1991-01-24 가부시기가이샤 히다찌세이사꾸쇼 기억회로
US5450342A (en) * 1984-10-05 1995-09-12 Hitachi, Ltd. Memory device
US5448519A (en) * 1984-10-05 1995-09-05 Hitachi, Ltd. Memory device
US5265234A (en) * 1985-05-20 1993-11-23 Hitachi, Ltd. Integrated memory circuit and function unit with selective storage of logic functions
JPS62194561A (ja) * 1986-02-21 1987-08-27 Toshiba Corp 半導体記憶装置
US5165039A (en) * 1986-03-28 1992-11-17 Texas Instruments Incorporated Register file for bit slice processor with simultaneous accessing of plural memory array cells
JPS6356732A (ja) * 1986-08-27 1988-03-11 Nec Corp マイクロコンピユ−タシステム
US5528551A (en) * 1987-05-21 1996-06-18 Texas Instruments Inc Read/write memory with plural memory cell write capability at a selected row address
US5257234A (en) * 1987-07-15 1993-10-26 Hitachi, Ltd. Semiconductor integrated circuit device
DE3884492T2 (de) * 1987-07-15 1994-02-17 Hitachi Ltd Integrierte Halbleiterschaltungsanordnung.
JPH0750391B2 (ja) * 1987-10-30 1995-05-31 株式会社日立製作所 表示用メモリ制御装置
JPH01130188A (ja) * 1987-11-16 1989-05-23 Yokogawa Electric Corp 波形表示装置
JPH02168496A (ja) * 1988-09-14 1990-06-28 Kawasaki Steel Corp 半導体メモリ回路
US5341488A (en) * 1990-04-11 1994-08-23 Nec Electronics, Inc. N-word read/write access achieving double bandwidth without increasing the width of external data I/O bus
US5262991A (en) * 1991-11-22 1993-11-16 Zilog, Inc. Device with multiplexed and non-multiplexed address and data I/O capability
US5537353A (en) * 1995-08-31 1996-07-16 Cirrus Logic, Inc. Low pin count-wide memory devices and systems and methods using the same
US5715197A (en) 1996-07-29 1998-02-03 Xilinx, Inc. Multiport RAM with programmable data port configuration
FR2761802B1 (fr) 1997-04-08 1999-06-18 Sgs Thomson Microelectronics Ensemble de deux memoires sur un meme circuit integre monolithique
JP3663043B2 (ja) * 1997-12-25 2005-06-22 三洋電機株式会社 マイクロコンピュータの書き込み終了の判別方法
JPH11184834A (ja) * 1997-12-25 1999-07-09 Sanyo Electric Co Ltd マイクロコンピュータ
KR100532471B1 (ko) * 2003-09-26 2005-12-01 삼성전자주식회사 입출력 데이터 위스 조절이 가능한 메모리 장치 및 그위스 조절 방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354256A (en) * 1979-05-04 1982-10-12 Fujitsu Limited Semiconductor memory device
DE3236524A1 (de) * 1981-10-02 1983-04-28 Raytheon Co., 02173 Lexington, Mass. Byteweise adressierbare speicheranordnung fuer befehle und daten mit variabler laenge
US4394753A (en) * 1979-11-29 1983-07-19 Siemens Aktiengesellschaft Integrated memory module having selectable operating functions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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JPS592905B2 (ja) * 1976-08-31 1984-01-21 日本ビクター株式会社 デイスプレイ装置
DE3009872C2 (de) * 1980-03-14 1984-05-30 Siemens AG, 1000 Berlin und 8000 München Verfahren zum Regenerieren von in einem dynamischen MOS-Speicher gespeicherten Daten unter Berücksichtigung von Schreib- und Lesezyklen und Schaltungsanordnung zur Durchführung des Verfahrens
JPS57179982A (en) * 1981-04-27 1982-11-05 Nippon Telegr & Teleph Corp <Ntt> Memory device
JPS57186289A (en) * 1981-05-13 1982-11-16 Hitachi Ltd Semiconductor memory

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354256A (en) * 1979-05-04 1982-10-12 Fujitsu Limited Semiconductor memory device
US4394753A (en) * 1979-11-29 1983-07-19 Siemens Aktiengesellschaft Integrated memory module having selectable operating functions
DE3236524A1 (de) * 1981-10-02 1983-04-28 Raytheon Co., 02173 Lexington, Mass. Byteweise adressierbare speicheranordnung fuer befehle und daten mit variabler laenge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE INTERNATIONAL SOLID-STATE CIRCUITS CONFERENCE, vol. 24, February 1981, pages 84-85, New York, US; S.S. EATON et al.: "A 100ns 64K dynamic RAM using redundancy techniques" *

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3618136A1 (de) * 1985-06-21 1987-01-02 Mitsubishi Electric Corp Abwechselnd adressierte halbleiterspeichergruppe
US4763302A (en) * 1985-06-21 1988-08-09 Mitsubishi Denki Kabushiki Kaisha Alternatively addressed semiconductor memory array
EP0230316A2 (fr) * 1986-01-22 1987-07-29 Hitachi, Ltd. Commande séquentielle
EP0230316A3 (en) * 1986-01-22 1989-04-05 Hitachi, Ltd. Programmable controller
EP0262413A1 (fr) * 1986-09-04 1988-04-06 Fujitsu Limited Dispositif de mémoire à multiplexage d'adresses
WO1988005244A1 (fr) * 1986-12-30 1988-07-14 Questech Limited Ameliorations apportees a l'enregistrement et a la production d'images de television mobiles
US5153726A (en) * 1986-12-30 1992-10-06 Questech Limited Recording and editing of moving television pictures
US5848004A (en) * 1991-04-18 1998-12-08 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
US5652723A (en) * 1991-04-18 1997-07-29 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
US6356484B2 (en) 1991-04-18 2002-03-12 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
US5544121A (en) * 1991-04-18 1996-08-06 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
US6026029A (en) * 1991-04-18 2000-02-15 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
US5559750A (en) * 1991-04-18 1996-09-24 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
EP0509811A2 (fr) * 1991-04-18 1992-10-21 Mitsubishi Denki Kabushiki Kaisha Dispositif de mémoire à semi-conducteurs
US5583813A (en) * 1991-04-18 1996-12-10 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
US5623454A (en) * 1991-04-18 1997-04-22 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
EP0817198A1 (fr) * 1991-04-18 1998-01-07 Mitsubishi Denki Kabushiki Kaisha Dispositif de mémoire à semi-conducteurs
EP0509811A3 (en) * 1991-04-18 1993-12-08 Mitsubishi Electric Corp Semiconductor memory device
US5629895A (en) * 1991-04-18 1997-05-13 Mitsubishi Electric Engineering Co., Ltd. Semiconductor memory device
US5650968A (en) * 1991-04-18 1997-07-22 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
GB2271449A (en) * 1992-09-29 1994-04-13 Ricoh Kk Dram and controller
US5630106A (en) * 1992-09-29 1997-05-13 Ricoh Company, Ltd. DRAM controller including bus-width selection and data inversion
GB2271449B (en) * 1992-09-29 1996-09-04 Ricoh Kk Method of processing data representative of a colour image
USRE38651E1 (en) * 1994-05-18 2004-11-09 Altera Corporation Variable depth and width memory device
US5717901A (en) * 1995-05-17 1998-02-10 Altera Corporation Variable depth and width memory device
GB2300952A (en) * 1995-05-17 1996-11-20 Altera Corp Variable depth and width memory device
GB2300952B (en) * 1995-05-17 1999-09-29 Altera Corp Variable depth and width memory device
GB2306238B (en) * 1995-10-10 1998-04-08 Holtek Microelectronics Inc Device and method for memory access
GB2306238A (en) * 1995-10-10 1997-04-30 Holtek Microelectronics Inc Interface circuit and method for memory access
US6052327A (en) * 1997-10-14 2000-04-18 Altera Corporation Dual-port programmable logic device variable depth and width memory array
US6392954B2 (en) 1997-10-14 2002-05-21 Altera Corporation Dual port programmable logic device variable depth and width memory array
US6191998B1 (en) 1997-10-16 2001-02-20 Altera Corporation Programmable logic device memory array circuit having combinable single-port memory arrays
US6288970B1 (en) 1997-10-16 2001-09-11 Altera Corporation Programmable logic device memory array circuit having combinable single-port memory arrays
US7111110B1 (en) 2002-12-10 2006-09-19 Altera Corporation Versatile RAM for programmable logic device

Also Published As

Publication number Publication date
DE3587329T2 (fr) 1993-06-17
DE3587329D1 (de) 1993-06-17
US4660181A (en) 1987-04-21
EP0156316A3 (en) 1989-06-28
JPS60200287A (ja) 1985-10-09
EP0156316B1 (fr) 1993-05-12

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